Iíve had my Raq3 for about 4 years now and it always had this problem.
The problem I have is at around 5:00am the server sends me a message saying:
Memory on the Cobalt server is heavily used.
The Cobalt server needs more memory than it currently has.
Consider adding more DRAM to the server.
Total memory is: 518864 KB
Used memory is: 506620 KB
Free memory is: 12244 KB
Percent used is: 97
After a while I upgraded the ram with a 256Mb chip so my total is 384Mb. The upgrade had no effect on the problem.
After the logs rotate at around 5:00am, the memory requirement lowers but progressively builds up over a 2-3 week period which requires I software restart the Raq3 periodically. A couple times a year I have to hard restart the Raq3.
Also, my log files are large for some of the virtual sites (over 200Mb!) which may be related to this problem.